As far as respects the general physiology and _internal_ anatomy of insects, they have done little more than bring together and combine the observations of the naturalists who have attended to these branches of the science: but the _external_ anatomy they have examined for themselves through the whole class, and, they trust, not without some new light being thrown upon the subject; particularly by pointing out and giving names to many parts never before noticed. In the _Terminology_, or what, to avoid the barbarism of a word compounded of Latin and Greek, they would beg to call the _Orismology_ of the science, they have endeavoured to introduce throughout a greater degree of precision and concinnity--dividing it into _general_ and _partial_ Orismology;--under the former head defining such terms as relate to _Substance_, _Resistance_, _Density_, _Proportion_, _Figure_, _Form_, _Superficies_, (under which are introduced _Sculpture_, _Clothing_, _Colour_, &c.) _Margin_, _Termination_, _Incision_, _Ramification_, _Division_, _Direction_, _Situation_, _Connection_, _Arms_, &c.; and under the latter those that relate to the body and its parts and members, considered in its great subdivisions of _Head_, _Trunk_, and _Abdomen_. In short, they may rest their claim of at least aiming at considerable improvement in this department upon the great number of new terms, and alterations of old ones, which they have introduced--in external Anatomy alone falling little short of 150. If it should be thought by any one that they have made too many changes, they would remind him of the advice of Bergman to Morveau, when reforming the nomenclature of Chemistry, the soundness of which Dugald Stewart has recognised--"_Ne faites grace à aucune dénomination impropre. Ceux qui savent déjà, entendront toujours; ceux qui ne savent pas encore, entendront plutôt._" Throughout the whole publication, wherever any fact of importance not depending on their own authority is mentioned, a reference to the source whence it has been derived is generally given; so that, if the work should have no other value, it will possess that of saving much trouble to future inquirers, by serving as an index to direct them in their researches.